Ice does not usually announce itself in a changing palette of vivid colours. Shawn Knol’s Ice Crystals Timelapse uses a particular lighting arrangement to reveal an optical side of a very familiar material.
Knol published the three-minute-fifty-second film in February 2014. His description identifies the subject as melting ice photographed with cross-polarized light, using a Canon T1i, a 105 mm macro lens and extension tubes.
Why does the ice look colourful?
Polarized-light imaging uses a polarizer before the subject and an analyser after it. A suitable crystalline material can alter the light passing through it, producing differences in brightness and colour when viewed through the second filter. Nikon’s MicroscopyU explanation describes this interaction with birefringent materials.
The colours therefore depend on the optical setup as well as the ice. They are not evidence that the sample contains brightly coloured dyes, and they should not be interpreted as a temperature map.
Melting changes the subject while time-lapse changes the pace
As the ice changes shape and thickness, its appearance in this lighting arrangement can change too. The time-lapse brings those changes together in a shorter viewing interval, making a gradual process easier to follow.
On a second viewing, follow one boundary or small region instead of trying to absorb the entire frame. That can make it easier to distinguish a changing crystal edge from a colour transition within the material.
The film combines a small subject, close photography and a patient observation period. Its appeal comes from making an ordinary process look newly worth noticing.
For another way ice affects visible light, read our light-pillar explanation. For a very different scale of moving ice, explore Perito Moreno’s glacier photographs.
Changing thickness becomes changing colour
Polarized-light imaging can turn differences in a crystalline material’s optical behaviour into visible contrast. Nikon’s explanation describes light components travelling differently through a birefringent specimen and interacting again at the analyser. In a melting-ice film, the changing material and light path can therefore produce a changing appearance rather than simply a shrinking transparent shape.
The colours are not evidence that coloured pigments have been added to the ice. Nor are they a temperature scale in which one hue directly tells the viewer a particular number of degrees. Their appearance depends on the material and imaging arrangement. That distinction allows the film to be enjoyed as an optical observation without assigning a measurement it was not designed to provide.
Knol’s stated macro lens and extension tubes explain the close attention to a small subject. The resulting frame can resemble a large abstract landscape because familiar size references are absent. Watching an edge retreat or a narrow feature disappear brings the scale back to the actual process: a small piece of ice changing over time, revealed through a deliberately chosen method of illumination.
Reference: www.microscopyu.com
Sources, photography and further reading
Original feature and image attributions:
- Shawn Knol
- LifeBuzz
- Mesmerizing Video Of A Man Melting A Car's Ice Sculpture In Reverse
- This Snow Melted Off the Cabin Roof in a VERY Strange Way.
- Original image link
- Nikon’s MicroscopyU explanation
- our light-pillar explanation
- Perito Moreno’s glacier photographs
Current reference information, checked 15 September 2026:
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